extends Node2D

# Setup is deferred to the first _process() tick rather than done in
# _ready(): PlanetAtmosphereController auto-spawns a 5-ship default fleet
# in ITS _ready() on any fresh (non-returning) Main.tscn load, and since
# this scene is itself added to the tree from inside _screenshot_tool.gd's
# own _initialize() (a nested, not-yet-settled context), there's no
# guaranteed ordering between the two _ready() calls - clearing the fleet
# here could run BEFORE that auto-spawn and then get silently overwritten
# by it. Waiting one frame guarantees it has already run first.
#
# Even after clearing, physics ticks can run several times before this
# script's own next _process() tick (softpipe rendering is slow, and
# physics is decoupled from it), so an auto-spawned ship can still get one
# shot off in flight toward these enemies before the clearing code above
# ever runs. Pausing the whole tree once everything is placed (last thing
# this script does) freezes any such shot in transit for good, rather than
# letting it arrive a few physics ticks later while the screenshot is
# still waiting out its frame count.

var main: Node
var setup_done: bool = false


func _ready() -> void:
	GameState.buildings.clear()
	GameState.extractors.clear()
	GameState.transporters.clear()
	main = load("res://Main.tscn").instantiate()
	add_child(main)
	main.get_node("BackgroundLayer").visible = false
	main.get_node("AsteroidField").visible = false
	main.get_node("PlanetField").visible = false
	main.get_node("BuildingField").visible = false
	main.get_node("EnemySpawner").set_process(false)
	main.get_node("AsteroidField").set_process(false)


func _process(_delta: float) -> void:
	if setup_done:
		return
	setup_done = true

	var fleet: Node = main.get_node("Fleet")
	for ship in fleet.ships:
		if is_instance_valid(ship):
			ship.set_physics_process(false)
	fleet.spawn_ships(0, Vector2.ZERO)
	# spawn_ships(0, ...) still isn't a truly empty fleet: it falls back to
	# one default interceptor whenever the requested composition would
	# otherwise be empty (Fleet.gd's own "the fleet is never really empty"
	# rule). Clear that forced ship too, and halt it the same way.
	for ship in fleet.ships:
		if is_instance_valid(ship):
			ship.set_physics_process(false)
			ship.queue_free()
	fleet.ships.clear()
	for projectile in get_tree().get_nodes_in_group("player_projectiles"):
		projectile.queue_free()

	var chaser: Node = load("res://Enemy.tscn").instantiate()
	chaser.enemy_id = "chaser"
	chaser.position = Vector2(-160, -80)
	main.add_child(chaser)
	chaser.speed = 0.0

	var sniper: Node = load("res://Enemy.tscn").instantiate()
	sniper.enemy_id = "sniper"
	sniper.position = Vector2(160, -80)
	main.add_child(sniper)
	sniper.speed = 0.0

	var camera: Camera2D = main.get_node("Camera2D")
	camera.zoom = Vector2(1.4, 1.4)

	get_tree().paused = true